Vacuum jug



FIG. 1 is a top and side perspective view of a vacuum jug showing my new design;

FIG. 2 is a side elevation thereof, the opposite side being the same;

FIG. 3 is a front elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a vacuum jug, as shown and described. 